Gladfield “Super-Sub” Low Alcohol NZ Pale Ale
Batch Size
29L Kettle Full; ~23L (in fermenter)
Ingredients
Malts
- 2.00kg Gladfield Munich Malt (66%)
- 0.24kg Gladfield Flaked Wheat (8%)
- 0.20kg Gladfield Rye Malt (6.6%)
- 0.12kg Gladfield Supernova Malt (4%)
- 0.12kg Gladfield Toffee Malt (4%)
Not Milled
- 0.24kg Harraway’s Rolled Oats (8%)
- 0.06kg Gladfield Oat Hulls (2%)
Hops
- 60min – 20g Wai-iti 3.2% (6 IBU)
- 15min – 30g Wai-iti 3.2% (5 IBU)
- 1min 25g Riwaka 6.4% (4 IBU)
- Whirlpool – (W/Pool and chill to ~80°C; add hops; stand 10min then chill + transfer to FV)
- 25g Riwaka 6.4% (2 IBU)
- 25g Wai-iti 3.2% (1 IBU)
- 50g Nectaron 11.7% (7 IBU)
- Dry Hop (@ SG= 1.016-1.020)
- 50g Riwaka
- 50g Wai-iti
- 100g Nectaron
DH rate = ~9g/L
Yeast
Lallemand London English Ale Yeast (1 x 11g Packet)
Mash Additions:
4.50g Calcium Chloride
2.00g Calcium Sulfate
1.50g Magnesium Sulfate
0.50g Sodium Chloride (Sea Salt ONLY - non iodized)
5-10mL 88% Lactic Acid (for pH Adjustment - requires pH Meter)
Brewing Process
- Heat Strike Water to achieve a Mash Temp of 69.5°C (~6°C above strike).
- Add minerals to Strike or Foundation water.
- Begin mashing in. Measure the mash pH (once all the grain is added) to achieve 5.2-5.5 (adjust with 1 mL additions of 88% lactic acid, if required).
- Mash at 69.5°C for 40mins. The Wort should be clear and free from residual starches.
- Batch sparge with 77°C water until kettle volume is achieved (or stop runoff when the last runnings drop below 1.010 and pH rises above 5.75).
- Boil for 75 minutes adding hops and kettle finings at indicated times.
- At End Of Boil, whirlpool whilst chilling to ~80°C.
- Turn off Cooling, then add Whirlpool addition and continue whirlpooling (COOLING OFF) for another 5 mins. Stand Whirlpool addition for 10min.
- Transfer to fermenter at 18-20°C, oxygenating wort (inline or via aeration in fermenter).
- Rehydrate and pitch yeast as per manufacturer's recommendations. Ferment at 18°C for the first 3-4 days.
- Aim to add the dry hop addition on day 5 or ~4-8 Specific Gravity points (1.5-2.0Po) from the predicted Final Gravity.
- Once added, cap the fermentation (spunding valves are great for this), raise the fermentation set point to 21°C for at least 48hrs to diacetyl rest.
Fining/ Filtering (Style Tip - Classic APAs should have good clarity)
- 48-72hrs after FG is reached (i.e. No “Buttery” Diacetyl), Crash to 5-6°C.
- Add preferred finings (Klarsol, Gelatine, etc.).
- Crash cool to 0-1°C wait for the beer to clear naturally or filter as required.
- Keg or bottle condition - your choice? Aim for 2.55-2.65 volumes of CO2.
- Drink within several months - lower alcohol beers are less microbiologically stable than higher strength beer.